<template>
  <nav-bar>
    <template v-slot:left>
      <div class="back" @click="backClick">
       <img src="~assets/img/common/back.svg" alt="">       
      </div>
    </template>
    <template v-slot:center>
      <div class="title">
        <div v-for="(item, index) in titles"
            class="title-item"
            :class="{active: index === currentIndex}"
            @click="titleClick(index)">
        {{item}}
        </div>       
      </div>
    </template>
    
  </nav-bar>
</template>

<script>
  import NavBar from 'components/common/navbar/NavBar'

  export default {
    name: "DetailNavBar",
    components: {
      NavBar
    },
    data() {
      return {
        titles: ['商品', '参数', '评论', '推荐'],
        currentIndex: 0
      }
    },
    methods: {
      titleClick(index) {
        this.currentIndex = index;
        this.$emit('titleClick',index);
      },
      backClick() {
        this.$router.back()
      }
    }
  }
</script>

<style scoped>
  .title {
    display: flex;
    font-size: 13px;
  }

  .title-item {
    flex: 1;
  }

  .active {
    color: var(--color-high-text)
  }

  .back img {
    margin-top: 12px;
  }
</style>
